What actually happened to the Library of Alexandria?

The popular story of one great fire that wiped out the ancient world's knowledge is a simplification. Books were certainly destroyed in Alexandria, but the library appears to have faded over centuries through neglect, lost patronage and damage to the city. Specialists still disagree about how much the fire of 48 BCE destroyed and whether anything of the library survived afterwards. [1] [2]

In 48 BCE Julius Caesar was in Alexandria supporting Cleopatra against her brother. The Romans set the Egyptian ships and wharves on fire to stop the enemy fleet, and the flames spread toward the Mouseion, according to [nationalgeographic.com](https://www.nationalgeographic.com/history/article/who-burned-library-of-alexandria-egypt). Plutarch says the library burned, while Seneca quotes a lost work that says 40,000 scrolls were destroyed. [2]

Gjert Vestrheim argues in a 2016 article that this was the library's only destruction. He says several ancient authors agree on the basic facts and that there is no firm evidence the library existed afterwards ([ptf.edu.pl](https://ptf.edu.pl/wp-content/uploads/2017/04/29_PDFsam_EOS-2016-2b.pdf)). Others disagree. [worldhistory.org](https://www.worldhistory.org/Library_of_Alexandria/) says the library cannot have been what burned, because later writers still refer to it. [open.edu](https://www.open.edu/openlearn/history-the-arts/library-alexandria/content-section-3/) notes that Plutarch wrote at least a century after the event, and that Dio Cassius may describe burned warehouses of books, not the library itself. Some scholars suggest the fire destroyed only papyri waiting in warehouses. [3] [4] [1]

Worldhistory.org dates the decline to Ptolemy VIII, who banished foreign scholars in 145 BCE, including the head librarian Aristarchus. Patronage weakened, and the post went to political allies. Because texts had been copied by then, many works existed elsewhere. Under Rome, support was uneven. Aurelian's recapture of Alexandria in 272 destroyed the library's district, and Diocletian leveled that area in 297. [4]

In 391 Bishop Theophilus oversaw the destruction of the Serapeum, the temple said to have held a "daughter library." Worldhistory.org says it is unknown whether books were still kept there. Vestrheim goes further and argues that no library existed in the Serapeum, citing the building's layout and the lack of any mention of a library in the sources for the event. The OpenLearn course says we cannot know what the daughter library held. [4] [3] [1]

The tale that Muslim conquerors burned the library is, according to the OpenLearn course, widely agreed by scholars to be fiction. It cites Bernard Lewis, who showed that the story has parallels in contemporary myth and folklore. [1]

Roger Bagnall, as presented by OpenLearn, argues that neglect and decay did as much damage as any single act. Evidence for continued library activity in Roman Alexandria, including later references to the Mouseion, supports this. Sebastian Modrow, quoted by National Geographic, says the library slowly declined through neglect and that little is recorded about it in the Roman imperial period. Matthew Battles likewise points to centuries of neglect. The sources do not say which loss was largest, and which manuscripts were lost is unknown. [1] [2] [5] [4]